Since 8.0, I have problem uploading images to posts/image field. The images upload successfully but the thumbnail for those images is not created. The images are stored in files/yyyy-mm/file.name or files/default_images/file.name. The thumbnail which should be in files/styles/thumbnail/public/yyyy-mm/file.name or files/styles/thumbnail/public/default_images/file.name do not exist. Actually, the files/styles is empty. Flush thumbnail image does not help.
There is no error related to the issue in log file.
My server is running:
Drupal 8.1.1
Nginx 1.8.1
PHP 5.6.19
MariaDB 10
Closed: outdated
9.5
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